Well-auger.



Np. 742,991. PATENTED NOV. 3, 1 903.

- V G. N. HUTGHINS.

v WELL AUGER.

APPLICATION IILED APR. 10. 1903.

N0 MODEL.

Wifriesses: .Zzvenfmfi' "m: norms r-zfus ca, mo'raumo, wnsumu'ron o c UNITED STATES Patented November 3, 1903.

CHARLES N. HUTOHINS, OF BROOKSHIRE, TEXAS.

WELL-AUGER.

SPECIFICATION forming part of Letters Patent No. 742,991, dated November 3, 1903.

Application filed April 10,1903- Serial No. 152,095. (No model.)

To all whom it may concern:

Be it known that I, CHARLES N. Horonmaa citizen of theUnited States, residing at Brookshire, in the county of Waller and State of Texas, have invented certain new and useful Improvements in Well-Angers, of which the following is a specification.

My invention relates to improvements in a well-auger in which pivoted expansion-bits operate in conjunction with a spiral auger; and the objects of my improvements are, first, to provide an anger that can be used inside of a well-casing and cut a hole of equal or greater diameter than the outside of the casing, and, second, to afford facilities for drawing the cuttings through the casing with the auger, all of which is accomplished by the mechanism illustrated in the accompanying drawings, in which- Figure 1 represents the spiral auger complete. Fig. 2 is a sectional view and shows bits closed or as they will appear when drawn through the casing. Fig. 3 is also a sectional View showing ends of bits and curvature of same and end view of shoulders which support the said bits.

The numerals-marked on the different views indicate the difierent parts.

Similar numerals refer to similar parts throughout. I

1 is the spiral auger, made in the well-known auger style.

2 represents shoulders forged on auger 1 horizontally across each side of the same near the point, the auger being flattened below the said shoulders 'to receive the bits 3, which will be referred to hereinafter, the object in the solidly-forged shoulders being to strengthen the anger at this point and form stops for the bits. 3 the bits of which there are two are formed with a curve as shown in Fig. 3, to

correspond with the twist in the spiral auger and are attached to opposite sides and edges of the said flattened portion of the spiral anger with independent pivot connections, the top edges of the bits 3 being exactly equal in length and thickness to the shoulders 2, against which they abut, when the bits are open or in cutting position. The end of the bit, through which pivot connection is made to the edge of the flattened portion of the anger, is rounded sufficiently to allow the bit to swing on the pivot, as shown in sectional view, Fig. 2, in the drawings, the end ofbit opposite to pivot connection having the cutting edge and the cutting edge extending from the center of the flattened portion of the auger to the outside point and being equal in length to one-half of the diameter of the hole to be bored. This is accomplished by cutting the ends of the bits having the cutting edges on an angle from the back to the point.

I am aware the spiral anger is old and also that expansion-bits have been made prior to my invention. I therefore do not claim such a combination broadly; but

What I do claim as my invention, and desire to secure by Letters Patent, is-- In a well-boring auger, the combination of a spiral auger flattened at the bottom and having two separate bits formed with a curve and to correspond with the twist in the spiral auger and secured to opposite sides of said flat bottom of the anger, the cutting-points extending in opposite directions with independent pivot connections through the edge of anger and end of bit farthest from its outting-point, substantially as described.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

CHARLES N. HUTGHINS. Witnesses:

G. A. KELLNER,

J. W. MARTIN. 

